A commission mandated by the state of Michigan has called for no THC limit for drivers.
The Departmental Road Safety Commission, appointed by former Governor Rick Snyder, is a six-member committee tasked with scientifically studying the effects of THC on driving. The panel included a patient who used cannabis for medical purposes as well as experts in law enforcement, forensic toxicology, cannabis pharmacology, and road safety. The commission studied pre-existing research on the relationship between cannabis and driving and conducted its own tests on road fluids in collaboration with the Michigan State Police.
The result of rapport found that there is a weak correlation between bodily THC content and impaired driving. In particular, the report mentions that due to the rapid elimination of THC content from the body, THC levels can be significantly lower at the time of a blood test, which significantly underestimates the amount of THC in the body. when the person got behind the wheel.
The report also suggests that "the zero tolerance policy" in the state of Michigan, assumes that there is an impairment of detection, ≥1ng / ml, could falsely conclude that a person is impaired " .
La commission also notes that frequent cannabis users need a much higher THC content in the body to achieve the desired effect. In other words, a state-imposed limit for driving with THC may not accurately reflect the driver's degree of impairment.
To reduce driver impairment, the Commission recommends more research, police training and public education.